Laser light source device, and projection system and control method thereof

A laser light source and projection system technology, applied in the field of projection, can solve problems such as the inability to effectively eliminate speckles and reduce laser coherence

Active Publication Date: 2020-05-12
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method of eliminating laser speckle is to add elements such as diffusers in the laser light path to reduce the coherence of the laser. Eliminate speckle

Method used

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  • Laser light source device, and projection system and control method thereof
  • Laser light source device, and projection system and control method thereof
  • Laser light source device, and projection system and control method thereof

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Embodiment Construction

[0040] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] The laser light source device, projection system and control method thereof provided by specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0042] The first aspect of the embodiments of the present invention provides a laser light source device, such as figure 1 As described above, the laser light source device provided by the embodiment of the present inv...

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Abstract

The invention discloses a laser light source device, a projection system and a control method of the projection system. According to the device, a laser beam is coupled into a multimode optical fiberfor transmission by adopting an optical coupling component, and the laser beam passing through the multimode optical fiber can generate random propagation time change, so that the time coherence of the laser is destroyed; then the laser beam passing through the multimode optical fiber enters an electro-refractive index changing component again, and a control signal is applied to the electro-refractive index changing component, so that the refractive index of a medium at the incident position of the laser beam is changed, and a spatial phase difference is generated at different positions by a light spot when the laser is emitted so as to reduce the spatial coherence of the laser; and the laser beam passing through the electro-refractive index changing component is incident to a light homogenizing component to further homogenize the laser beam. According to the laser light source device provided by the embodiment of the invention, the time and space coherence of the laser can be reducedat the same time, and speckles generated by the laser are effectively inhibited.

Description

technical field [0001] The invention relates to the field of projection technology, in particular to a laser light source device, a projection system and a control method thereof. Background technique [0002] Laser projection display technology, also known as laser projection technology or laser display technology, is a display technology that uses red, green, and blue primary color lasers as light sources. It can truly reproduce the rich and gorgeous colors of the objective world and provide more shocking expressiveness. . Because laser has the characteristics of good monochromaticity, high energy, and narrow bandwidth of monochromatic laser, laser display technology has higher color gamut coverage than traditional display technology, and realizes perfect color reproduction. See the most real and most beautiful world. [0003] However, precisely because of the strong coherence of laser light, when the coherent light passes through the projection system for imaging, an ir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G02B27/48
CPCG03B21/2033G03B21/206G03B21/208G02B27/48
Inventor 郭汝海刘卫东
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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